This can be problem for Firefox and Chromium based Browsers, too. If the Website decides that Manifest v3 is mandatory to visit their site, they can block any access from Browsers with v2 running in the background easier than before.
Luckily the first link is for a deprecated property that returns a hard coded list for compatability reasons, and the other two are extension apis that random websites can't access.
The other 95% of all visitors will still want to see this page.
If the most visited websites use such a blocking method, then most visitors will use Chrome.